self-tracker
n. A person who uses websites or other technologies to meticulously track various aspects of his or her body, mental state, and activities.
Other Forms
Examples
2009
The Internet had long ago turned navel-gazing into an international pastime, but self-tracking takes the self-absorption to a new level. Using elaborate graphs, pie charts, websites and newer technologies, self-trackers catalogue everything in their lives, sometimes with no clear result.
—Zosia Bielski, “My so-called life,” The Globe and Mail, February 19, 2009
2009
Are self-trackers narcissists? In the video above, from the recent QS Show&Tell, I report on trying to find an answer. Here I give a quick summary of that talk and a reference link. I decided to run this test because a few weeks ago Alexandra Carmichael made a detailed and helpful report on her self-tracking project. Sandy Lane made the following comment:

Does it measure your narcissism too?
—Gary Wolf, “Are Self-Trackers Narcissists?,” The Quantified Self, February 17, 2009
2008 (earliest)
Messina and Evans prefer the term "data junkies," spoken with the self-effacing self-awareness that comes from months of meticulous self-study.

Self-trackers like Messina and Evans could spend hours online, charting, analyzing, tracking. Life as a series of pure, distilled data points, up for interpretation.
—Monica Hesse, “Bytes of Life,” The Washington Post, September 09, 2008
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